Monogamous female seahorses cheat on their male partners when they can’t smell them any more.
“Seahorses can express incredible loyalty and affection once a pair has bonded during the reproductive season,” says Dong Zhang at the Chinese Academy of Fishery Sciences in Shanghai.
The curvy-tailed couples usually stay together for months or years. They live within a few metres of each other and meet up at daylight for “morning greetings” that reinforce their bond – swimming in parallel, brightening their …
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